add always builtin for run to force command to always run (but allow cached mounts)
#147
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hinshun
approved these changes
May 18, 2020
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Created issue to remove hack when possible. |
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The implementation is a bit of a hack. There does not seem to be a way via llb to make an exec call force a cache-miss other than
llb.IgnoreCache, but that will also prevent any mounts from also using cache.So this PR adds a random env var so that the vertex will always hash to a new digest while still allowing mount cache to be used.